Valve-refacing apparatus



June 10 1924.. 1,47,G53

- F. o. ALBERTSON VALVE REFAGING APPARATUS Filed Aug. 1; 1921. s She'ets-Sheet 1 T Jaw- June 10 B924, I 1,497,053

- F. o. ALBERTSON VALVE REFAGING' APPARATUS Filed Aug 1. 1921 .Fune 10, 1924., 1,497,053

F. O. ALBERTSON VALVE REFACING APPARATUS Filed Aug. 1 1921 5 Sheets-Sheet 3 Patented June 10, 1924.

current stares PATENT I FRANS O. ALBERTSON, SIOUX CITY, IO'WA, ASSIGNOR TO ALBERTSON & COMPANY, OF SIOUX CITY, IOWA, A CORPORATION OF IOWA.

vALvE-aErAoINe ArPARaT s.

Application fi1ed:August 1, 1921. Serial No. 488,829.

To all whom it may concern:

Be it known that I, FRANS O. ALBnRTsoN, a citizen of the United States, and. resident of Sioux City, in the county of Woodbury and State of Iowa, have inventeda certain.

new and useful Improvement in Valve-Ree facing Apparatus, of which the following is afull, clear, concise, and exact description, reference being had: to the accompanying l0 drawings, forming a part of this specification.

My invention relates to an apparatus intended for use in refacing internal combustion engine puppet valves. Among its prin cipal objects my invention contemplates the provision of:

First, a valve refacing apparatus that readily may be adaptedfor use in refacingj the beveled surface of any valve, regardless of the size of the valve and regardless of the inclination of its beveled surface.

Second, a valve refacingapparatus which comprises a cutting element which by minute angular shifts may from time to time be caused to present an infinite number of fresh effective cutting edges to in refaced.

hird, an apparatus of the class mentioned which may be operated manually and by a single operator.

Fourth, a valve refacingapparatus comprising novel adjustable means for positioning the feed screw in line with the axis of the stem of a valve to be refaced.

Fifth, a valve refacing apparatus comprising improved means for preventing chattering of the cutting element and for regulating the force necessary to move the cutting element across the beveled surface of the valve to be refaced.

Sixth, a valve refacing apparatus which is of simple and rugged construction and which can be economically manufactured.

Other objects and advantages of my invention will appear as the following detailed description progresses.

In the accompanying drawings illustrating my invention:'

Figure 1 is a side elevational view of the valve refacing apparatus of my invention;

Figure 2 is a top plan view thereof with portions of the head of the valve to be refaced and of the swiveled disc of the feed screw broken away;

the valve be- -jecting horizontal shelf 10 and a 'valve Figure 3. is. an elevational view of: that: end of the apparatus which carriesthe feedv screw bracket;

Figure-41s a vertical section taken onthe line of Figure 1;

Figure 5 is a fragmentary detailed. section taken on the. line5 -5 of'Figure'2; and

Figure. 6 is a fragmentary detailed: sec? tion taken on the line 66 of Figure 5.

Similar characters of reference refer to:

' corresponding parts throughout. the several views. Referring first. to Figs. 1 to 3, at 10'Ihave: illustrated the unitary castframe whichis provided with a base 10 a laterally pro-- stem bearing bracket 10,the latter rising above the shelf. The base 10 'is convenient; ly secured. to a suitable support, such as a work bench,.by screws or the like. The bracket 10 is provided on that face thereof which lies away from the shelf 10 with a pair of spaced vertical ribs 11-11. Formed in each-rib 11 is a V-shaped notch 12. The apices of the notches 12-12 lie in a straight line parallel with the upper surface of shelf 10*. Itis the purposeof notches 12-l2 to receive the. stem of a puppet valve to be refaced. Such a valve is indicated at PV. The valve stem is retained in the notches 1212 by'bearing bars lit-13. Associated with'each bar 13 is a pair of screws 14.-1 1-, each of these screws extending freely through an aperture in its associated bar and co-operating withthe threaded opening in one of the ribs 11. In, practice the screws 1414 are turned down sufliciently to hold the valve stem firmly in the notches 12 12, but not tight enough to prevent the valve stem from being turned in the notches by means of the handle 15. This handle is attached to the valve stem in any suitable manner, as, for instance, by set screw 16.

The shelf 10 is provided with a machined upper surface and with a vertical bore 17. Mounted upon the shelf 10 for adjustment 100 relative thereto around an axis co-incident with the axis of bore 17 is a cutter head carrier indicated at 18. The cutter head carrier is held in any desired adjustmentby a shoulder screw 19 which extends freely through the bore 17 and co-operates with the internal threads of carrier bore 20. 'A

/ washer 21' is preferably'interposed between this groove is a screw 25.

the cutter head carrier.

the screw head and the under surface of shelf 10 and the screw head is preferably provided with a pair of intersecting transverse bores 2222 which are adapted to receive the screw operating bar or handle 23.

The'cutter head carrier 18 consists of a metal block which is provided with a plane lower surface which is preferably machined accurately to fit the machined upper surface of shelf 10. Formed in the block is a longitudinalgroove 2 and centrally disposed in One end of the screw 25 bears in and extends freely through a bore 26 and the other end of the screw bears in and extends freely through an aperture in a plate 27 which is secured to one end of the carrier block by screws 28 28. Longitudinal displacement of the screw is prevented by the screw head and by a nut 29. The screw is preferably provided with an operating disc 30 which is clamped between nuts 29 and 31..

The sides of groove 2% are bounded by ribs tin- 2 which have undercut surfaces 33 33 so that the cutter head indicated at 34t may have sliding dovetailed attachment to This arrangement is very clearly illustrated in Fig. 6. Cooperating with the screw 25 and arranged to move along the same when the screw is rotated is a nut 35, this nut being provided I with an upwardly projecting boss 35, which engages in an aperture in cutter head 34:. Thus the cutter headis reciprocated relative to the cutter head carrier when the screw 25 is rotated.

Formed in the upper surface of the cutter head 34 is a transverse channel 36 which receives a cutter holder 87, this cutter holder being in the form of a bar which may be adjusted transversely of the cutter head. The cutter holder is held in adjusted position by a clamping plate 38 and its co-operating screw 39, the latter having threaded engagement. with the boss which rises fron'i. the cutter head on one side of the channel. 36. That end of the cutter holder which projects beyond one side of the cutter head provided with an inclined upper surface indicated at 3'7. Resting upon surface 3? is a cutter -10 which is in the form of metal disc beveled to provide a continuous circular cutting ed e. The cutter is preferably formed of tungsten steel. The cutter is pro vided with a central aperture through which freely projects a screw 41 which is threaded into holder 37, as illustrated in Fig. 6.

The sides of the cutter head carrier 18 are parallel with the axis of screw 25 and hence parallel with the line in which the cutter head reciprocates when the screw is rotated. Shelf 10 is preferably provided on its upper surface with suitable lines and identifying indicia, (illustrated in Fig. 2), to facilitate adjustment of the cutter head carrier so the axis of a valve to be refaced.

that operation of the screw 25 will cause the cutter 40 to reciprocate in a line at 30, 4-5 or 60 to the axis of the valve to be refaced. Th6 heads of puppet valves now in general use are almost universally provided with bevels of 30, 45 or 60, but it will be under stood, of course, that the cutter head carrier may be adjusted so that the cutter will be reciprocated in a line at any desired angle with respect to the axis of the valve to be refaced.

At this point I will state that it is extremely important that the cutter head 34% be prevented from chattering upon the cutter head carrier and it is also extremely desirable that the operator be able to regulate to a nicety the degree of force which must be exerted upon screw 25 to reciprocate the cutter head with respect to the cutter head carrier. I provide means for accomplishing both of these purposes. Formed in one side of the cutter head is a pair of threaded horizontal bores 4l-2t2 which ter minate opposite the undercutfaces of one of the cutter head carrier ribs 32 (Fig. 6). Loosely disposed in each of these bores is a cylinder 43, preferably of brass, having its inner end coned on an angle of taper complimentary to the angle of the undercut rib face. The cylinders are urged inwardly toward the undercut rib face by screws l l- 44-. The cutter head carrier will, of course, be made of a metal which will wear well against brass. By nnuiipulating screws 4%;- l l: the operator can absolutely prevent the cutter head from chattering upon the carrier and, furthermore, may suitably brake relative movement between the cutter head and the carrier.

1 now call attention to the feed screw bracket 15. The bracket is in the form of a cast bar having its lower end pivoted to frame 10 by screw 46 for swinging move ment in a vertical plane at right angles of At its upper end the bracket 45 carries a feed screw 4-7 which is provided on its inner ends with the conventional swivel disc 48, the disc be ing preferably dished, as shown. The braclc et furthermore carries a set screw as for locking the feed screw in any desired position with respect to the bracket. lnt-rmediate its ends the bracket is provided with a notch 50 w iich is arranged to receive a stud 51 when the bracket is moved into a vertical, or substantially vertical position. The stud 51 is fixed in. frame 10 and is threaded to receive a milled nut 55 which serves to retain the bracket in vertical position, or in any substantially vertical position to which it may be adjusted.

Threaded edgewise into the bracket (Fig. 3) is a screw 52 which terminates in th notch 50. Thus the screw 52 engages the stud 51 when the feed screw bracket is in the position shown in Fig. 3. Screw 52 .may, if desired, be provided with a lock nut 53. The purpose of screw 52 will more fully hereinafter appear.

Let us now assume that a valve of the type shown at PV is to be refaced. The

valve is placed with the stem thereof rest-" ing in the V-shaped notches 1212 and screws 14-44 are turned down so that the plates 13-13 hold the valve stem firmly in the notches 1212, without, however, in terfering with comparatively free movement of the stem, both longitudinal and rotatable. Prior to placing the valve in the refacer, a coiled spring S is placed around that portion of the valve stem nearest the head. Thus when the valve is positioned illustrated in Figs. 1 and 2, one end of the spring S bears against the valve head and the other end thereof bears against bearing bracket 10 and the adjacent one of the bars 13. The feed screw bracket is now moved to the position shown in Fig. 3 with the axis of the feed screw coinciding with the axis of the valve stem. The cutter head carrier 18 is now adjusted so that operation of the disc 30 and its associated screw will cause the cutter to reciprocateat an angle to the valve axis corresponding to the angle of the valve head taper. In the pres ent case the selected angle will be 45 and the cutter head carrier, when adjusted to the position shown in Fig. 2, will be locked tightly to the shelf by turning shoulder screw 19 through the agency of operating handle The feed screw 47 is now manipulated to move the valve longitudinally against the pressure of spring S, andto bring the valve head taper to a point where it will be acted upon by the edge of the circular cutter 4:0. The valve is now rotated by means of the handle and while he valve rotates the screw is operated to move the cutter across the beveled surface of the valve ina line at an angle to the valve axis which corresponds to the an gularity of the valve head taper. It will be noted that the cylinder cutting element reciprocates in the plane of its circular cutting edge and that only a very small portion or, in fact, a point on the cutting edge comes into contact with the valve head. If the cutting first taken in the beveled surface of the valve head is not sufficient properly to reface the same, a further out or cuts may be taken by properly ad usting the feed screw 47 and then rotating the valve and manipulating the cutter feed screw 25 in the manner hereinbefore described.

Valve refacing tools heretofore provided have. so far as I am aware, been universally provided with cutting tools having rectilinear cutting edges. I have found that the refacin g of an engine puppet valve will very shift of the cutting tool to bring a freshand sharp portion of the cutting edge into cutting relation with the valve.

It is extremely desirable that the feed screw 47 be always disposed concentric with the axis of the valve when the same is being refaced. It will be understood, of course, that the notches 12-12 always hold the valve, regardless of the diameter of its valve stem, so that the axis of the valve lies in the horizontal plane of the apices of the notches. Since the feed screw bracket is mounted for swinging movement on a long radius, it will be seen that the axis of the feed, screw will never be appreciably vertically disposed from the axis of the valve, regardless of the diameter of the stem. of the particular valve being refaced. lVhile it is true the notches 12-12. always locate the valve axis in a definite horizontal plane, it will beunderstood that the notches do not locate the axes of valvestems of different diameter in the same vertical plane. The adjustable abutment screw, 52, associated with the feed screw supporting bracket 45, enables the operator to prevent the. axis of the feed screw from being displaced horizontally fromthe axis of the valve.

adjusts the screw 52 so that the feed screw axis coincides with the valve axis. After this adjustment has been secured it is preserved for all valves of the same kind and all the operator need do in any case to bring the feed screw axisinto alignment with the valve axis is to move the feed screw bracket to the position where the abutment screw 52 engages the stud 51. The bracket is, of course, locked in operating position by the milled nut co-operating with the stud 51.

Having thus described my invention, what I claim is new and desire to secure by Letters Fatent of the United States is 1. A valve refacing apparatus comprising a frame including a valve stem bearing bracket provided with aligned V-shaped notches in one side thereof, means for retaining the stem of a valve in said notches, a feed screw supporting bar having its lower end pivoted to the frame at a point a substantial distance below the horizontal plane in which the apices of said notches are 10- cated,a feed screw carried at the upper end In refacingthe first of a number of valves of the same character, the operator of said bar and adapted to bear against the head of a valve having its stem disposed in said notches, a notch in said bar intermediate its ends, a stud carried by the frame adapted to be received by said bar notch when the bar is in vertical or substantially vertical position, a nut co-operating withsaid stud adapted to retain the feed screw in any position wherein the stud is received in said bar notch, and an adjustable screw carried by said bar and projecting into said bar notch, said last mentioned screw adapted to abut with said stud.

2. A valve refacing apparatus comprising a frame provided with aligned ii-shaped notches, means for retaining a valve stem in said notches, a bar having one end pivoted to the frame at a pointremote from a straight line passing through the apices of said V-shaped notches, said bar being capable of swinging movement in a plane normal to the axis of a valve disposed in said notches, a feed screw carried by said bar at the free end thereof and adapted to bear against the head of a valve to be refaced, a notch in said bar at a point intermediate its ends, a stud carried by the frame adapted to be received in said bar notch, and an adjustable screw carried by the bar and projecting into said bar notch, said last mentioned screw adapted to contact with said stud.

3.19; valve refacing apparatus comprising a frame provided with aligned V-shaped notches, means for retaining a valve stem in said notches, a bar having one end pivoted to the frame at a point remote from a straight line passing through the apices of said V-shaped notches, said bar being capable of swinging movement in a plane normal to the axis of a valve disposed in said notches, a feed screw carried by said bar at the free end thereof and adapted to bear against the head of a valveto be refaced, a notch in said bar intermediate its ends, means carried by the frame adapted to be received in said bar notch, and an adjustable screw carried by the bar and projecting into said bar notch, said screw adapted to contact with the frame carried means which is received in said bar notch, as aforesaid.

4. A valve refacing apparatus comprising a frame provided with aligned V-shaped notches, means for retaining a valve stem in said notches, a feed screw adapted to bear against the head of a valve disposed with this stem in said notches, means for mounting the feed screw for swinging movement, on a long radius, in a plane normal to the axis of the valve disposed in said notches, a locking device carried by the frame adapted to retain the feed screw mounting means in a plurality of positions, and an adjustable abutment carried by the feed screw mounting means, said adjustable abutment adapted to contact with the looking means aforesaid.

A valve refacing apparatus comprising a frame provided with means for engaging and rotatably supporting the stem of a valve to be refaced, a cutter head carrier rotatably mounted on said frame, a cutter head having dovetailed engagement with said cutter head carrier and adapted to move relatively thereto, a cutter carried by the cutter head, a cutter head operating screw carried by the cutter head carrier and means for preventing chattering of the cutter head upon the cutter head carrier and for braking relative movement between the cutter head and carrier, said last mentioned means comprising threaded bores in the cutter head terminating opposite one of the undercut faces of the carrier, the cylinders in said bores having the ends thereof next adjacent said undercutface coned on an angle of taper complementary to the angularity of the undercut face, and screws in said bores adapted to force the coned ends of said cylinders into enga ement with the undercut face aforesaid.

6. A valve refacing apparatus comprising a cutter head carrier and a cutter head mounted thereon for reciprocation relatively thereto, a screw for reciprocating the cutter head upon the carrier, said cutter head and said carrier being provided with co-operating undercut faces afiording a dovetailed sliding connection between said members, a bore in one of said members terminating opposite one of the undercut faces of the other member, a shoe freely disposed in said bore, that end of the shoe next adjacent said last mentioned undercut surface being tapered 'on an angle corresponding to the angularity of the undercut surface, and a screw threaded into said bore and adapted to urge the tapered end of the shoe into engagement with said undercut surface.

7. A valve refacing apparatus comprising, a frame provided with means for rotatably supporting a valve stem, a feed screw adapted to bear against the head of valve thus supported, means for mounting the feed screw for swinging movement on a radius in a plane at right angles to the axis of the Valve stem, a locking device carried by the frame arranged to retain the feed screw mounting in a plurality of positions, and an adjustable abutment carried by the feed screw mounting, said abutment being arranged to contact with the said locking means.

8. A valve refacing apparatus comprising, a frame provided with means for engaging and rotatably supporting the stem of a valve to be refaced, a cutter head carrier rotatably mounted on said frame, a cutter head hav ing dovetail connection with said cutter head carrier and adapted to move relatively thereto, a feed screw adapted to bear against the head of a valve, means for mounting the feed screw for swinging movement on a long radius in a plane normal to the axis of the valve, a rotatably adjustable disc-like cutter carried by the cutter head and a cutter head operating screw arranged to move said cutter across the face of the valve.

9. A valve ret'acing apparatus comprising a frame provided with aligned V-shaped notches, means for retaining a valve stem in said notches, a bar having one end pivoted to the frame at a point remote from a straight line passing through the apeXes of said V-shaped notches, said bar being capable of swinging movement in a plane normal to the axis of a valve disposed in said notches, and a feed screw carried by said bar adjacent to the free end thereof and adapted to bear against the head of a valve to berefaced- 10. A valve refacing apparatus comprising a frame provided with aligned V-shaped notches, means for retaining a valve stem in said notches, a feed screw adapted to bear against the head of a valve disposed with its stem in said notches, means for mounting said feed screw for swinging movement, a locking device carried'by the frame adapted to retain the feed screw mounting means in a plurality of positions, and an adjustable abutment carried by the feed screw mounting means, said abutment being arranged to contact with said locking means.

In witness whereof, I hereunto subscribe my name this 6th day of July, 1921.

FRANS O. ALBERTSON.

Witnesses HARRY ANDERSEN,

PEARL A s'r, 

